| 5501 | East Sussex Rother catchment management plan : action plan |
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| 5502 | East Sussex Rother catchment management plan : consultation report |
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| 5503 | Wastewater disinfection field trials (231/4/SW) |
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| 5504 | 1997 general quality assessment (GQA) and river ecosystem (RE) non-compliance : Devon area |
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| 5505 | An investigation into possible causes of poor water quality at Blakewell Bridge (R30A001) on the Bradiford Water |
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| 5506 | An investigation into possible causes of poor water quality at Nymphayes Bridge (R30D009) on the Gissage Lake |
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| 5507 | Water quality monitoring locations 1992 |
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| 5508 | An investigation into the bacterial water quality of the River Umber, N. Devon : December 1996 : DEV/WQ/14/96 |
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| 5509 | An investigation into the elevated BOD levels at Brocken Bridge (R30H001) on the Barnstaple Yeo [DEV/E/20/95] |
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| 5510 | NRA Anglian Region Plan Summary 1991/1992 |
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| 5511 | Assessment of the impact of discharges from Meldon Quarry on the water quality of the West Okement River |
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| 5512 | Datchet, Wraysbury, Staines and Chertsey flood study : aquatic biology. Part 2 : a survey of the wetland vegetation and aquatric macroinvertebrates of the Abbey River and Chertsey Bourne |
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| 5513 | Options for development of an enhanced team culture in the NRA, using the Welsh Regional Technical Department as an example |
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| 5514 | General Quality Assessment (GQA) Devon Area 1994 |
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| 5515 | Hartland and Clovelly streams : catchment action plan |
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| 5516 | Hartland streams river water quality classification 1990 |
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| 5517 | Hartland streams river water quality classification 1991 |
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| 5518 | North Devon coast and Lyn catchment river water quality classification 1990 |
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| 5519 | Water for the future in Kent : NRA response to the issues and options report |
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| 5520 | North Devon coast and Lyn catchment river water quality classification 1991 |
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| 5521 | River Taw : catchment action plan |
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| 5522 | River Taw catchment management plan : public consulatation |
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| 5523 | River Taw catchment river water quality classification 1990 |
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| 5524 | River Taw catchment river water quality classification 1991 |
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| 5525 | River Torridge and Hartland streams : action plan : plan from September 1999 to September 2004 |
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